Gas barrier adhesive sheet, method for producing same, electronic member, and optical member

• US 9,580,625 B2
• Filed: 07/25/2012
• Issued: 02/28/2017
• Est. Priority Date: 08/03/2011
• Status: Active Grant

• Current Assignee: Lintec Corporation
• Original Assignee: Lintec Corporation
• Inventors: Fuchi, Emi, Kenmochi, Suguru, Naganawa, Satoshi, Nagamoto, Koichi
• Primary Examiner(s): Walshon, Scott R
• Application Number:
  US14/236,494
• Publication Number:
  US 20140178622A1
• Time in Patent Office: 1,679 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: C09J 2203/318 for the production of liquid crystal displays
• CPC Class Codes: C09J 2203/326 for bonding electronic components such as wafers, chips or semiconductors
• CPC Class Codes: C09J 2301/312 parameters being the characterizing feature
• CPC Class Codes: C09J 2400/123 in the substrate
• CPC Class Codes: C09J 2400/163 in the substrate
• CPC Class Codes: C09J 2421/00 Presence of unspecified rubber
• CPC Class Codes: C09J 2433/00 Presence of (meth)acrylic polymer
• CPC Class Codes: C09J 7/38 Pressure-sensitive adhesives [PSA]
• CPC Class Codes: Y10T 428/1476 Release layer
• CPC Class Codes: Y10T 428/28 Web or sheet containing structurally defined element or component and having an adhesive outermost layer
• CPC Class Codes: Y10T 428/2848 Three or more layers

Abstract

Provided is a gas barrier pressure-sensitive adhesive sheet having at least one gas barrier layer and at least one pressure-sensitive adhesive layer, the at least one pressure-sensitive adhesive layer having a storage modulus at 23° C. of 1.5×10⁴ to 1.0×10⁷ Pa, and the gas barrier pressure-sensitive adhesive sheet not including a base layer. Also, provided is the following: a gas barrier pressure-sensitive adhesive sheet that makes it possible to easily provide the adherend with a gas barrier capability without significantly increasing the thickness of the gas barrier pressure-sensitive adhesive sheet, does not show delamination (separation) at the interface between the pressure-sensitive adhesive layer and another layer even when subjected to high-temperature/high-humidity conditions, and exhibits excellent bendability, a method for producing the same, an electronic member that includes the gas barrier pressure-sensitive adhesive sheet, and an optical member that includes the gas barrier pressure-sensitive adhesive sheet.

Claims

1. A gas barrier pressure-sensitive adhesive sheet comprising at least one gas barrier layer, at least one pressure-sensitive adhesive layer, and at least one release sheet,

wherein the at least one pressure-sensitive adhesive layer has a storage modulus at 23°

C. of 2.0×

10⁴ to 8.0×

10⁴ Pa and has a storage modulus at 80°

C. of 7.8×

10³ to 2.3×

10⁴ Pa,

the gas barrier pressure-sensitive adhesive sheet having a substantial thickness of 0.5 to 50 μ

m, and

other than the release sheet, each layer included in the gas barrier pressure-sensitive adhesive sheet does not satisfy either requirement 1 or 2;

requirement 1;

a paper or a plastic film having a thickness of 10 μ

m or more; and

requirement 2;

a plastic film having a tensile modulus at 23°

C. of 200 to 5000 MPa.

2. The gas barrier pressure-sensitive adhesive sheet according to claim 1, the gas barrier pressure-sensitive adhesive sheet having a water vapor transmission rate at a temperature of 40°

C. and a relative humidity of 90% of 0.1 g/m²/day or less.

3. The gas barrier pressure-sensitive adhesive sheet according to claim 1, wherein the at least one pressure-sensitive adhesive layer is formed of a pressure-sensitive adhesive that includes a silane coupling agent or an alkoxy metal compound.

4. The gas barrier pressure-sensitive adhesive sheet according to claim 1, further comprising a protective layer.

5. The gas barrier pressure-sensitive adhesive sheet according to claim 1, the gas barrier pressure-sensitive adhesive sheet being a pressure-sensitive adhesive sheet for an electronic member or an optical member.